Universal lid for large solid waste containers

A plastic lid for large commercial and industrial solid waste containers, comprising:

• a central area of said lid having a single wall ribbed construction;
• the perimeter edges of said lid having a hollow double wall cross-sectional configuration integrally joined to said central area of said lid;
• said cross-sectional configuration having a predetermined vertical extent;
• said lids having a plurality of hinge lugs along the rear edge thereof, said hinge lugs having a height substantially greater than said predetermined height;
• but are equal to or less than twice said predetermined extent;
• said lids being substantially symmetrical for permitting stacking with alternate lids facing in opposite directions;
• and
• the front edge being shaped to provide vertical clearance for said hinge lugs on said rear edges when the lids are stacked with said edges of adjacent lids being in engagement and adjacent lids being reversed in orientation;
• whereby said lids may be stacked with the vertical height of the stack being equal to the number of lids multiplied by said predetermined thickness of the hollow edges, plus the height of the ribs of one lid above the hollow edge thereof.

A stack of plastic lids for large commercial and industrial solid waste containers, comprising;

• a plurality of said lids each comprising:
• (a) a central area of said lid having a single wall ribbed construction;
• (b) the perimeter edges of said lid having a hollow double wall cross-section configuration integrally joined to said central area of said lid;
• said hollow edge configuration having a predetermined vertical extent;
• (c) said lids having a plurality of hinge lugs along the rear edge thereof, said hinge lugs having a height substantially greater than said predetermined extent;
• but equal to or less than twice said predetermined extent;
• (d) said lids being substantially symmetrical for permitting stacking with alternate lids facing in opposite directions;
• and
• (e) the front edge being shaped to provide vertical clearance for said hinge lugs on said rear edges when the lids are stacked with said hollow edges of adjacent lids being in engagement and adjacent lids being reversed in orientation;
• and
• said lids being arranged in a stack with the rear of said lids having said hinge lugs extending in one direction in alternate lids, and in the opposite direction for the intermediate lids, and with the hollow perimeters of adjacent lids being in engagement;
• whereby said lids may be stacked with the vertical height of the stack being equal to the number of lids multiplied by said predetermined thickness of the hollow edges, plus the height of the ribs of one lid above the hollow edge thereof.